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X2
Active Crossover
OWNER’S MANUAL
Now Hear This
6400 Goodyear Road
Benicia, CA 94510
800-NHT-9993
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Specifications X2 Active Crossover Frequency response: 15Hz - 220Hz +/-3dB through L/R input (continuously variable) 15 - 220Hz +/-3dB through LFE input (fixed) 50, 80, 110Hz-100KHz +/-3dB Distortion: < 0.01% subwoofer output @ 100Hz, 1V < 0.001% hi-pass output @ 1KHz, 1V Signal to noise ratio: >105dB at Hi-pass output >100dB at subwoofer output Crossover: Low-pass continuously variable between 30-220Hz, 12dB/octave Low-pass fixed at 220Hz,12dB/octave High-pass selectable between 50, 80, 110H
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Block Diagram and Schematic Below is a block diagram of the X2 crossover. This may be useful when integrating the X2 into your system. A schematic of the X2 is available on our website at www.nhthifi.com. This may be useful if you wish to modify any of the filter characteristics in the X2. This is only recommended for users with the correct technical training and will completely void your warranty. LFE in LFE Gain LFE out 50, 80, 110 Hz L HP out HPF HPF Master Gain 30-220Hz Phase Phase 20 Hz
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Tower With Stereo Subwoofers AV Receiver or Surround Processor Line Output Subwoofer L Output R (Optional) X2 Amplifier Amplifier Amplifier Amplifier Speaker Speaker Speaker Speaker Outputs Outputs Outputs Outputs ---- ++++ Line Line Line Line Input Input Input Input --++ High High Tower Tower L R - + - + Low Low
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Tower With Mono Subwoofers AV Receiver or Surround Processor Line Output Subwoofer L Output R (Optional) X2 Amplifier Amplifier Amplifier Speaker Speaker Speaker Outputs Outputs Outputs -- - ++ + Line Line Line Input Input Input -- ++ High High Tower Tower L R - + - + Low Low
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Satellite Subwoofer Systems The X2 can be used to crossover a mono or stereo subwoofer to a stereo satellite system as long as the desired crossover frequency falls into the 50 to 200Hz range. If using a mono subwoofer, three channels of amplification will be needed. If using a stereo subwoofer system, four channels of ampli- fication will be needed. See the following diagram for the proper system wiring when biamplifying with an X2. AV Receiver or Surround Processor Line Output Subwoofer L Out
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X2 Active Crossover Design The NHT X2 active crossover is designed to provide convenient front-panel adjustment of the controls necessary to integrate one or two subwoofer(s) with a Left and Right satellite speaker or to biamp a 3-way tower loudspeaker. The unit has unbalanced RCA and balanced XLR inputs and outputs for connection with all types of receivers or separate audio components. The X2 active crossover can operate as either a mono (single channel) or stereo unit (dual channel). In
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On the rear panel of the X2 is a 3-position switch that determines the trigger mode: 1) On; the X2 is always on. 2) Audio; the X2 will automatically turn on when it detects an audio signal and turn off after 20 min- utes with no signal. 3) 12V Ext; the X2 is remotely turned on when it detects a DC control signal from another com- ponent in your system. The external trigger accepts 5 - 24 volt (DC) signals. For more information regarding external triggers, consult your authorized dealer. Mas
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High Pass Filter Switch (Rear Panel) The High Pass Filter determines the range of frequencies that the main speakers ("satellites") will reproduce. For example, a high pass setting of 80Hz means that the main speakers receive a signal containing only frequencies above 80Hz. The 3-positon High Pass Filter is selectable between 50Hz, 80Hz, and 110Hz to accommodate a vari- ety of speaker sizes. Set the High Pass Filter to a frequency above the rated low frequency limit of the main speakers. F
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Gain Switch (Rear Panel) The Subwoofer Gain switch allows you to increase the gain of the X2 subwoofer output by 10dB. Normally, the factory default "0" position will give you a wide range of volume adjustment. However, if the sensitivity of your satellite speakers is greater than 93dB, your range of volume adjustment on the X2 may be limited. In this case, set the Gain Switch to 10dB. Boundary EQ (Front Panel) Reflective boundaries (such as walls) reinforce a speaker's bass output (3dB for
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System Status Indicators (Front Panel) Located on the right hand side of the front panel are two LEDs. They are used to indicate the func- tional status of the X2 Crossover. P - Power LED (green) - indicates the X2 is on and in a ready condition. S - Standby LED (amber) - indicates the X2 crossover is in "standby" mode. 8.5 Fine Tuning Chart The chart below was developed to assist you in the further fine tuning of your subwoofer or tower sys- tem. Should you be unable to achieve satisfacto
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Limited Warranty Valid Only in the U.S.A. Warranty Period For the period of 5 years for parts and 5 years for labor from date of original purchase (the warranty period) from an author- ized NHT dealer, Now Hear This (NHT) warrants that if our product fails to function properly under normal use due to a man- ufacturing defect when installed and operated according to the owner’s manual instructions enclosed with the unit, it will be repaired or replaced with a unit of comparable value at the optio
